- 您现在的位置：买卖IC网 > PDF目录15297 > LTC3855EFE#TRPBF (Linear Technology)IC REG CTRLR BUCK PWM CM 38TSSOP PDF资料下载
参数资料
| 型号： | LTC3855EFE#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 9/44页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 38TSSOP |
| 标准包装： | 2,000 |
| 系列： | PolyPhase® |
| PWM 型： | 电流模式 |
| 输出数： | 2 |
| 频率 - 最大： | 850kHz |
| 占空比： | 95% |
| 电源电压： | 4.5 V ~ 38 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 38-TFSOP （0.173"，4.40mm 宽）裸露焊盘 |
| 包装： | 带卷 (TR) |
第1页第2页第3页第4页第5页第6页第7页第8页当前第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页
LTC3855
PIN FUNCTIONS
(FE38/UJ40)
ITEMP1, ITEMP2 (Pin 2, Pin 1/Pin 37, Pin 36): Inputs of
the temperature sensing comparators. Connect each of
these pins to external NTC resistors placed near induc-
tors. Floating these pins disables the DCR temperature
compensation function.
RUN1, RUN2 (Pin 3, Pin 17/Pin 38, Pin 13): Run Control
Inputs. A voltage above 1.2V on either pin turns on the IC.
However, forcing either of these pins below 1.2V causes
the IC to shut down the circuitry required for that particular
channel. There are 1μA pull-up currents for these pins.
Once the Run pin rises above 1.2V, an additional 4.5μA
pull-up current is added to the pin.
SENSE1 + , SENSE2 + (Pin 4, Pin 12/Pin 39, Pin 8): Current
Sense Comparator Inputs. The (+) inputs to the current
comparators are normally connected to DCR sensing
networks or current sensing resistors.
SENSE1 – , SENSE2 – (Pin 5, Pin 13/Pin 40, Pin 9): Current
Sense Comparator Inputs. The (–) inputs to the current
comparators are connected to the outputs.
TK/SS1, TK/SS2 (Pin 6, Pin 11/Pin 1, Pin 7): Output Volt-
age Tracking and Soft-Start Inputs. When one particular
channel is configured to be the master of two channels,
a capacitor to ground at this pin sets the ramp rate for
the master channel’s output voltage. When the channel
is configured to be the slave of two channels, the V FB
voltage of the master channel is reproduced by a resistor
divider and applied to this pin. Internal soft-start currents
of 1.2μA are charging these pins.
I TH1 , I TH2 (Pin 7, Pin 10/Pin 2, Pin 6): Current Control
Thresholds and Error Amplifier Compensation Points.
Each associated channels’ current comparator tripping
threshold increases with its I TH control voltage.
V FB1 , V FB2 (Pin 8, Pin 9/Pin 3, Pin 5): Error Amplifier
Feedback Inputs. These pins receive the remotely sensed
feedback voltages for each channel from external resistive
dividers across the outputs.
DIFFP (Pin 14/Pin 10): Positive Input of Remote Sens-
ing Differential Amplifier. Connect this to the remote load
voltage of one of the two channels directly.
DIFFN (Pin 15/Pin 11): Negative Input of Remote Sensing
Differential Amplifier. Connect this to the negative terminal
of the output capacitors.
DIFFOUT (Pin 16/Pin 12): Output of Remote Sensing Dif-
ferential Amplifier. Connect this to V FB1 or V FB2 through
a resistive divider.
I LIM1 , I LIM2 (Pin 18, Pin 19/Pin 14, Pin 15): Current
Comparator Sense Voltage Range Inputs. This pin can
be tied to SGND, tied to INTV CC or left floating to set the
maximum current sense threshold for each comparator.
PGOOD1, PGOOD2 (Pin 20, Pin 21/Pin 16, Pin 17): Power
Good Indicator Output for Each Channel. Open drain logic
out that is pulled to ground when either channel output
exceeds ±10% regulation window, after the internal 20μs
power bad mask timer expires.
EXTV CC (Pin 27/Pin 24): External Power Input to an Inter-
nal Switch Connected to INTV CC . This switch closes and
supplies the IC power, bypassing the internal low dropout
regulator, whenever EXTV CC is higher than 4.7V. Do not
exceed 6V on this pin.
INTV CC (Pin 28/Pin 25): Internal 5V Regulator Output. The
control circuits are powered from this voltage. Decouple
this pin to PGND with a minimum of 4.7μF low ESR tan-
talum or ceramic capacitor.
V IN (Pin 29/Pin 26): Main Input Supply. Decouple this pin
to PGND with a capacitor (0.1μF to 1μF).
BG1, BG2 (Pin 30, Pin 26/Pin 27, Pin 23): Bottom Gate
Driver Outputs. These pins drive the gates of the bottom
N-Channel MOSFETs between PGND and INTV CC .
PGND1, PGND2 (Pin 31, Pin 25/Pin 28, Pin 22): Power
Ground Pin. Connect this pin closely to the sources of the
bottom N-channel MOSFETs, the (–) terminal of C VCC and
the (–) terminal of C IN .
3855f
相关PDF资料 |
PDF描述 |
|---|---|
| VE-JWF-EY-F3 | CONVERTER MOD DC/DC 72V 50W |
| LTC3835EFE#PBF | IC REG CTRLR BUCK PWM CM 20TSSOP |
| VE-JWK-EY-F3 | CONVERTER MOD DC/DC 40V 50W |
| VE-JWK-EY-F2 | CONVERTER MOD DC/DC 40V 50W |
| VE-JWJ-EY-F1 | CONVERTER MOD DC/DC 36V 50W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3855EUJ#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 40-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:PolyPhase® 标准包装:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX |
| LTC3855EUJ#PBF | 制造商:Linear Technology 功能描述:IC DUAL SYNC DC/DC CONTROLLER QFN-40 |
| LTC3855EUJ#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 40-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:PolyPhase® 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LTC3855IFE#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 38-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:PolyPhase® 标准包装:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX |
| LTC3855IFE#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 38TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:PolyPhase® 标准包装:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX |
发布紧急采购，3分钟左右您将得到回复。